Question Text
Question 2 :
Translate the following statements into chemical equations and then balance them:
Hydrogen sulphide gas burns in air to give water and sulphur dioxide.
Question 3 :
Identify the substances that are oxidised in the following reactions.
$CuO(s)+ H_{2}(g) \rightarrow Cu(s)+ H_{2}O(l)$
Question 4 :
Why does the colour of copper sulphate solution change when an iron nail is dipped in it?
Question 5 :
Write the balanced chemical equations for the following reactions:
Aluminium + Copper chloride $\rightarrow$ Aluminium chloride + Copper
Question 6 :
Write the balanced chemical equation for the following and identify the type of reaction in each case:
Zinc carbonate (s) $\rightarrow$ Zinc oxide (s)+ Carbon dioxide (g)
Question 7 :
Balance the following chemical equations:
$NaCl + AgNO_{3} \rightarrow AgCl + NaNO_{3}$
Question 8 :
Write the balanced chemical equation for the following and identify the type of reaction in each case:
Zinc carbonate (s) $\rightarrow$ Zinc oxide (s)+ Carbon dioxide (g)
Question 9 :
Balance the following chemical equations:
$BaCl_{2} + H_{2}SO_{4} \rightarrow BaSO_{4} + HCl$
Question 10 :
A solution of a substance 'X' is used for white washing
Write the formula of 'X'.